Add 40/54 and 70/84
40/54 + 70/84 is 85/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 54 × 14 = 756,
40/54 = 40 × 14/54 × 14 = 560/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
70/84 = 70 × 9/84 × 9 = 630/756 - Add the two like fractions:
560/756 + 630/756 = 560 + 630/756 = 1190/756 - 1190/756 simplified gives 85/54
- So, 40/54 + 70/84 = 85/54
In mixed form: 131/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/54+70/84